<template>
    <el-container class="home-container">
        <!--头部区域-->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
            <!--页面主体区域-->
            <el-container>
                <!--侧边栏-->
                <el-aside :width="isCollapse ? '64px' : '200px'">
                    <div class="toggle-button" @click="toggleCollapse">|||</div>
                    <!--侧边栏菜单区域-->
                    <el-menu  background-color="#333744" text-color="#fff" 
                        active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false"
                        router :default-active="activePath">
                        <!--一级菜单-->
                        <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                            <!--一级菜单1模板区域-->
                            <template slot="title">
                                <!--图标-->
                                <i :class="iconsObj[item.id]"></i>
                                <!--文本-->
                                <span>{{item.authName}}</span>
                            </template>
                                <!--二级菜单-->
                                <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" 
                                :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                                    <template slot="title">
                                        <!--图标-->
                                        <i class="el-icon-menu"></i>
                                        <!--文本-->
                                        <span>{{subItem.authName}}</span>
                                    </template>
                                </el-menu-item>
                        </el-submenu>
                    </el-menu>
                </el-aside>
                <!--右侧内容主体-->
                <el-main>
                    <router-view></router-view>
                </el-main>
            </el-container>
    </el-container>
</template>

<script>
export default {
    data(){
        return{
            //左侧菜单数据
            menulist:[],
            iconsObj:{
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao'
            },
            //是否折叠
            isCollapse: false,

            //被激活的链接地址
            activePath: ''
        }
    },
    created() {
      this.getMemuList()
      this.activePath  = window.sessionStorage.getItem('activePath')
    },
    methods:{

        logout(){
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        // 获取所有的菜单
        async getMemuList(){
            const {data: res} = await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data
            console.log(res)
        },
        //点击按钮切换菜单保存
        toggleCollapse(){
            this.isCollapse = !this.isCollapse
        },
        //保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath = activePath
        }
    }
    
}
</script>

<style lang="less" scoped>
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu {
        border-right: none;
    }
}
.el-main{

    background-color: #eaedf1;
}
.home-container{
    height: 100%;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>